Authors / CoAuthors
Dunne, J. | Wang, L. | PoudjomDjomani, Y. | Feitz, A.
Abstract
The integrated use of seismic and gravity data can help to assess the potential for underground hydrogen storage in salt caverns in the offshore Polda Basin, South Australia. Geophysical integration software was trialled to perform simultaneous modelling of seismic amplitudes and traveltime information, gravity, and gravity gradients within a 2.5D cross-section. The models were calibrated to existing gravity data, seismic and well logs improving mapping of the salt thickness and depth away from well control. Models included known salt deposits in the offshore parts of the basin and assessed the feasibility for detection of potential salt deposits in the onshore basin, where there is limited well and seismic coverage. The modelling confirms that candidate salt cavern storage sites with salt thicknesses greater than 400-500 m should be detectable on low altitude airborne gravity surveys. Identification of lower cost onshore storage sites will require careful calibration of gravity models against measured data, rather than relying on the observation of rounded anomalies associated with salt diapirism. Ranking of the most prospective storage sites could be optimized after the acquisition of more detailed gravity and gradiometry data, preferably accompanied by seismic reprocessing or new seismic data acquisition.
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document
eCat Id
148625
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
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- theme.ANZRC Fields of Research.rdf
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- EARTH SCIENCES
- ( Project )
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- EFTF - Exploring for the Future
- ( Feature type )
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- salt deposits
- ( Discipline )
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- geophysical modelling
- ( Place )
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- Polda Basin
- ( Feature type )
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- Gravity survey
- ( Feature type )
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- seismic survey
- ( Theme )
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- Hydrogen storage
- ( Feature type )
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- salt cavern
- ( Project )
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- Australia's Future Energy Resources
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- Published_External
Publication Date
2023-08-14T23:26:57
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accepted
Purpose
As part of Exploring for the Future, results from this work is released as a pdf document.
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asNeeded
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geoscientificInformation
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This work is undertaken in collaboration with QIntegral as part of Exploring for the Future program. This work aims to map salt in the Polda Basin using integrated geophysical modelling. All the results have been released as a pdf document.
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[-34.9845, -33.2461, 132.1116, 136.3114]
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